How to Test Gold, Silver and Other Precious Metals
To start, make three test solutions as follows: Bottle #1: Schwerter’s Testing Solution – Mix 1 gram of Potassium Dichromate with 22ml of concentrated Nitric acid and 8ml distilled water. Bottle #2: Mix 1 part (by volume) Hydrochloric acid and 50 parts of Nitric acid. Add to 12 parts of distilled water. Bottle #3: Aqua Regia – Mix by volume – one part Nitric acid to 3 parts Hydrochloric acid. Caution!! Aqua regia is highly corrosive. Freshly prepared… Read More »How to Test Gold, Silver and Other Precious Metals